wip

mangezmieux-backend/internal/postgres/database_error.go

@@ -0,0 +1,32 @@
+package postgres
+
+import (
+	"fmt"
+)
+
+type Type int
+
+const (
+	ErrTypeNotFound Type = iota
+	ErrTypeDuplicate
+	ErrTypeForeignKeyViolation
+)
+
+type Error struct {
+	Cause error
+	Type  Type
+}
+
+func NewDAOError(t Type, cause error) error {
+	return &Error{
+		Type:  t,
+		Cause: cause,
+	}
+}
+
+func (e *Error) Error() string {
+	if e.Cause != nil {
+		return fmt.Sprintf("Type %d: %s", e.Type, e.Cause.Error())
+	}
+	return fmt.Sprintf("Type %d: no cause given", e.Type)
+}

mangezmieux-backend/internal/postgres/database_postgresql.go

@@ -0,0 +1,35 @@
+package postgres
+
+import (
+	"database/sql"
+	"github.com/lib/pq"
+	"mangezmieux-backend/internal/logger"
+)
+
+const (
+	pgCodeUniqueViolation     = "23505"
+	pgCodeForeingKeyViolation = "23503"
+)
+
+func HandlePgError(e *pq.Error) error {
+	if e.Code == pgCodeUniqueViolation {
+		return NewDAOError(ErrTypeDuplicate, e)
+	}
+
+	if e.Code == pgCodeForeingKeyViolation {
+		return NewDAOError(ErrTypeForeignKeyViolation, e)
+	}
+	return e
+}
+
+func NewDatabasePostgreSQL(connectionURI string) *sql.DB {
+	db, err := sql.Open("postgres", connectionURI)
+	if err != nil {
+		logger.GetLogger().WithError(err).Fatal("Unable to get a connection to the postgres db")
+	}
+	err = db.Ping()
+	if err != nil {
+		logger.GetLogger().WithError(err).Fatal("Unable to ping the postgres db")
+	}
+	return db
+}

mangezmieux-backend/internal/postgres/setup.go

@@ -0,0 +1,11 @@
+package postgres
+
+import "mangezmieux-backend/internal/injector"
+
+const DatabaseKey = "POSTGRES"
+
+func Setup(inj *injector.Injector, connectionURI string) {
+	client := NewDatabasePostgreSQL(connectionURI)
+
+	inj.Set(DatabaseKey, client)
+}